Advantech PCL-746+ Скачать руководство пользователя страница 34 | Manualshive

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Chapter 5 Wiring 31

An example of the installation for port 4 is as follows:

TR1

120Ω

120Ω

CH4 T.R.8

Terminal

Resistor

RS-422 Termination resistor installation

RS-485 Signal wiring

The RS-485 standard supports half-duplex communication. This means
that just two wires are needed to both transmit and receive data.
Handshaking signals (such as RTS, Request To Send) are normally
used to control the direction of the data flow and to switch the
transmission accordingly. In RS-485 mode, the PCL-746+ automatically
senses the direction of the data flow and switches the transmission
direction hence no handshaking is necessary. This means a user can
build an RS-485 network with just two wires. This RS-485 control is
completely transparent to the user. The Software written for half
duplex RS-232 works without the need for any modification. The
connections are as follows:

DB-25 Male: PCL-746+

DB-25 Male or Female:

Terminal

Pin

Signal

Pin

Signal

3

DATA+

3

DATA +

7

GND

7 GND

8

DATA-

8

DATA -

TR1

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Содержание PCL-746+

Страница 1: ...by any means without the prior written permission of Advantech Co Ltd Information provided in this manual is intended to be accurate and reliable However Advantech Co Ltd assumes no responsibility for its use nor for any infringements of rights of third parties which may result from its use Acknowledgments PC LabCard is a trademark of Advantech Co Ltd IBM PC and PC XT AT are trademarks of Internat...

Страница 2: ......

Страница 3: ...tocol Selection 11 I O Address and Interrupt Setup 13 Chapter 3 Installation 21 Card installation 22 Chapter 4 Software Installation For UNIX Users 23 SCO UNIX XENIX 24 Chapter 5 Wiring 27 Wiring 28 RS 232 signal wiring 28 RS 422 signal wiring 30 RS 485 Signal wiring 31 Appendix A Connector Pin Assignments 33 Appendix B PC I O Address Reference 37 APPENDIX B PC I O Address Usage 38 ...

Страница 4: ...Chapter 1 Introduction 1 1 Introduction C H A P T E R ...

Страница 5: ...e set up individually as either the address or the IRQ channel In enhanced mode all four ports can be set to share the same IRQ When an on board interrupt occurs the interrupt status register indicates which port has generated it The shared interrupt can be set to most common extended AT interrupts This simplifies programming speeds up interrupt processing and frees up interrupts for other devices...

Страница 6: ...mper selectable IRQ 3 4 5 7 9 10 11 12 or 15 On board interrupt status register for greater throughput Compatible with standard PC ports COM1 COM2 COM3 or COM4 RS 422 or RS 485 modes jumper selectable Automatic data flow control in RS 485 mode Supports 2 wire or 4 wire RS 422 RS 485 operation Space reserved for terminator resistor Space reserved for optional surge protection on all port lines RS 4...

Страница 7: ...ess control Specifications Board Numberofports 4 Protocol selection RS 232 RS 422 or RS 485 jumper selectable UART PCL 746 4x16C550 16byteFIFO Base I O address selection From 100H to 3C0H IRQ selection 3 4 5 7 9 10 11 12 or 15 Interrupt status register From 000H to 3F0H Data bits 5 6 7 8 Parity Even odd or none Stop bits 1 1 5 2 Powerconsumption 5V 800mAtypical 1 5Amax 12V 60mAtypical 120mAmax Ope...

Страница 8: ...50 feet 15 2 meters RS 422 Interface Signals TxD TxD RxD RxD RTS RTS CTS CTS GND Mode Asynchronous full duplex point to point Maxdatarate 115Kbps Maxdatadistances 4000feet 1220meters RS 485 Interface Signals DATA DATA GND Mode Halfduplex multi drop Maxdatarate 115Kbps Maxdatadistances 4000feet 1220meters Connectors 30 cm male DB 37 to four male DB 25 cable Weight 250 g ...

Страница 9: ...6 PCL 746 User s Manual ...

Страница 10: ...Chapter 2 Hardware Installation 7 2 Hardware Configuration C H A P T E R ...

Страница 11: ...artment or your local sales representative immediately Also notify the carrier Retain the shipping carton and packing material for inspection by the carrier After inspec tion we will make arrangements to repair or replace the unit When you handle the PCL 746 remove it from its protective packag ing by grasping the rear metal panel Keep the anti vibration packing Whenever you remove the card from t...

Страница 12: ...Chapter 2 Hardware Installation 9 PCL 746 Switch and Jumper Layout ...

Страница 13: ...will have three pins labeled 1 2 and 3 In this case you would connect either pins 1 and 2 or 2 and 3 You may find pair of needle nose pliers useful for setting the jumpers If you have any doubts about the best hardware configuration for your application contact your local distributor or sales representative before you make any changes Card Configuration Each port of the PCL 746 card has two associ...

Страница 14: ...ting in RS 232 RS 422 or RS 485 You can configure each port to operate in a different mode if required Each port has to be individually setup by selecting the correct jumper configurations on two jumper groups one pair for each port These consist of a 12 3 pin jumper RS 232 and a 1 3pinjumper RS 422 RS 485 Note The second RS 422 RS 485 jumper group is ineffective when the main jumper group is conf...

Страница 15: ...r RS 485 mode selection the 1 3 pin jumpers for each port have to be configured For RS 422 configuration the upper two pins of the 3 pin jumper should be connected A 2 pin jumper is used for Tx control Closing the jumper initiates Tx automatic flow control An open jumper means that Tx is always on For RS 485 configuration the bottom two pins of the 3 pin jumper should be connected The 2 pin jumper...

Страница 16: ... four ports can be setup as the address or the IRQ channel individually Port1 CH1 Base Address AAA CH1IRQM Port2 CH2 Base Address BBB CH2IRQN Port3 CH3 Base Address CCC CH3IRQO Port4 CH4 Base Address DDD CH4IRQP Enhanced Mode In this mode all four ports share the same IRQ and continue to use the cards designated IRQ address This mode also utilizes an interrupt status register designed to indicate ...

Страница 17: ...O Base Address S1 S4 Select an address which is not already in use by another card in the system If you are installing more than one PCL 746 card in your system set the cards to different base addresses DIP switches S1 S4 control the card s base address as shown S1 S4 DIP Switch Figure Card base address S1 S4 Base address A3 A4 A5 A6 A7 A8 A9 100H l l l l l l 108H l l l l l 110H l l l l l l l l 30...

Страница 18: ...orts is shown below Port 1 j JP4 Port 2 j JP3 Port 3 j JP2 Port 4 j JP1 Enhanced Mode IRQ Selection JP4 Select an IRQ which is not already in use by another card in the system If you are installing more than one PCL 746 set them to a different IRQ number Jumper bank JP4 controls the card IRQ Simply place the jumper on the required interrupt level as shown in the following figure JP4IRQ12 default o...

Страница 19: ...ted to generate an interrupt If the bit is 1 then no interrupt is generated DIP switch S5 controls the cards interrupt status register as shown in the following figure and table S5 280H default Interrupt status register S5 Bit Function 0 Port 1 1 Port 2 2 Port 3 3 Port 4 4 Not Used 5 Not Used 6 Not Used 7 Not Used The user may change the interrupt status address via S5 Please note that the address...

Страница 20: ...Chapter 2 Hardware Installation 17 S5 DIP switch settings 000H to 110H ...

Страница 21: ...18 PCL 746 User s Manual S5 DIP switch settings 120H to 230H ...

Страница 22: ...Chapter 2 Hardware Installation 19 S5 DIP switch settings 240H to 350H ...

Страница 23: ...20 PCL 746 User s Manual S5 DIP switch settings 360H to 3F0H ...

Страница 24: ...Chapter 3 Installation 21 3 Installation C H A P T E R ...

Страница 25: ...nsion slots or passive backplane at the rear of the PC and choose any unused slot 5 Remove the screw that secures the expansion slot cover to the PC save the screw to secure the interface card retaining bracket Remove the anti vibration card clamp if supplied 6 Carefully grasp the upper edge of the PCL 746 card Align the hole in the retaining bracket with the hole on top of the expan sion slot Ali...

Страница 26: ...Chapter 4 Software Installation UNIX Users 23 4 Software Installation For UNIX Users C H A P T E R ...

Страница 27: ...XENIX The PCL 746 is compatible with Arnet 4 port cards Under SCO UNIX XENIX you can install up to two cards in one system The two four port cards should be set to Enhanced mode and the switch settings are as follows Primary Interrupt 4 ...

Страница 28: ...terrupt 3 After you have set the above switches to the appropriate settings please enter the system maintenance mode and type mkdev serial The screen will display You would like to install a 1 1 port card 2 2 port card 3 4 port card 4 5 port card 5 8 port card ...

Страница 29: ...ystem will configure the 4 port card as tty1a tty1b tty1c and tty1d Repeat the above procedure to configure a secondary 4 port card if required the system will configure the secondary 4 port card as tty2a tty2b tty2c and tty2d You may then enable the tty by entering enable tty1a enable tty1b enable tty2c enable tty2d At this point you may connect the system up as necessary ...

Страница 30: ...Chapter 5 Wiring 27 5 Wiring C H A P T E R ...

Страница 31: ...tion Examples include PC s terminals and some printers DCE refers to the device being communicated with or con trolled Examples include modems DSU s digital service units printers and lab factory equipment In some situations you may be able to get by with just three lines data on TXD a signal ground and a handshaking line Examples are printer or plotter connections troubleshooting and situations w...

Страница 32: ...al the DCE RS 232 interfaces are reversed themselves Terminal without handshake DB 25 Male PCL 746 Terminal PC DTE Pin Signal Pin Signal 2 TxD 3 RxD 3 RxD 2 TxD 4 RTS 5 CTS 7 GND 7 GND 6 DSR 20 DTR 8 DCD The maximum length of a RS 232 cable is 100 ft If you need to connect over longer distances longer than 100 ft please use RS 422 or RS 485 modes to match this requirement If not using CTS RTS DSR ...

Страница 33: ... The signals DSR DTR DCD are shorted internally on PCL 746 card whist operating in the RS 422 mode The terminal resistors for impedance matching on the PCL 746 are not installed at the factory The user can install the resistors with the appropriate resistances according to the cards application Each terminal resistor corresponds to a different channel for TxD or RxD lines Usually these resistors a...

Страница 34: ...ol the direction of the data flow and to switch the transmission accordingly In RS 485 mode the PCL 746 automatically senses the direction of the data flow and switches the transmission direction hence no handshaking is necessary This means a user can build an RS 485 network with just two wires This RS 485 control is completely transparent to the user The Software written for half duplex RS 232 wo...

Страница 35: ...stor corresponds to a different channel for DATA DATA lines Usually these resistors are needed for both ends of the communication wires and the value of the resistors should match the characteristic impedances of the wires used approx 120 ohm An example of the installation for port 4 is as follows CH4 120Ω Terminal Resistor RS 485 Termination resistor installation RS 485 Wiring topology D T E RS 4...

Страница 36: ...Appendix A Connector Pin Assignments 33 A Connector Pin Assignments A P P E N D I X ...

Страница 37: ... 746 User s Manual The following diagrams show the pin assignments for DB 37 and DB 25 connectors for RS 232 RS 422 and RS 485 Modes PCL 746 Pin assignment for RS 232 PCL 746 DB 37 Four Port Connectors DB 25 ...

Страница 38: ...Appendix A Connector Pin Assignments 35 PCL 746 DB 37 Four Port Connectors DB 25 PCL 746 Pin assignment for RS 422 ...

Страница 39: ...3 6 PCL 746 User s Manual PCL 746 DB 37 Four Port Connectors DB 25 PCL 746 Pin assignment for RS 485 ...

Страница 40: ...Appendix B PC I O Address Reference 37 B PC I O Address Reference A P P E N D I X ...

Страница 41: ...imer Counter 060 063 PPI 8255A 070 071 Real Time Clock 080 08F DMA Page Register 0A0 0BF 8259A Interrupt Chip 0C0 0DF Second DMA Controller 8237A 0F0 0FF Math Coprocessor 1F0 1F8 AT Fixed Disk 200 20F Game I O 278 27F Serial I O Port 2 2F8 2FF Serial Adaptor COM 2 320 32F XT Fixed Disk 378 37F Parallel Printer Adaptor 380 38F SDLC Binary Communication Adaptor 3A0 3AF Master Binary Communication Ad...

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